DE102017215443A1 - Rotary machine for handling containers - Google Patents

Abstract

Described is a rotary machine for treating containers. This comprises a fixed base, a rotatable container table for receiving the container, designed as an internal rotor motor for direct drive of the container table, a bearing for supporting the container table and / or rotatably associated support structure at the underlying radially outside the motor, and a rotary encoder for Drehlagenbestimmung of the container table. The fact that the rotary encoder is arranged radially outside the motor, the accuracy of the rotational position determination can be improved in particular for rotary machines with comparatively large pitch diameters and the accessibility of the rotary encoder for maintenance measures.

Description

The invention relates to a rotary machine according to the preamble of claim 1.

Generic rotary machines for the treatment of containers are known from DE 10 2013 218438 A1 known. For direct rotational position determination of the container table, that is to say without indirect rotational speed measurement on the drive motor and / or an intermediate gear, a rotary encoder arranged centrally on the center axis of the rotary machine is used. The drive motor extends beyond the rotary encoder in the radial direction.

As rotary machines with ever greater pitch diameters are needed and rotary encoders are to be readily accessible for maintenance, there is an increasing need for more precise rotational position determination and improved access to drive components and rotary encoders of the tray table.

The object is achieved with a rotary machine for treating containers according to claim 1. Accordingly, the rotary machine comprises a fixed base, a rotatable container table for receiving the container, designed as an internal rotor motor for direct drive of the container table, a bearing for supporting the container table and / or rotatably connected to the container table support structure on the subframe radially outside of the engine, and a rotary encoder for Drehlagenbestimmung the container table.

The fact that the rotary encoder is arranged radially outside the motor, both the accuracy of the encoder, in particular its angular resolution, as well as the accessibility of the encoder for maintenance measures against a centrally located in the region of the engine arranged rotary encoder can be improved.

The rotary encoder consists of at least one sensor and at least one material measure scanned by the sensor.

An arrangement radially outside the motor is to be understood that both sensor and dimensional standard of the rotary body are arranged radially outside of the stator and the rotor of the motor.

In an internal rotor, the container table and / or its support structure are connected to the internal rotor of the motor.

The bearing is designed to accommodate the axial forces and radial forces occurring during operation.

Preferably, the rotary encoder is arranged in the region of the container table and / or the support structure at a radial distance of less than 0.2 m from the bearing. This allows a low-vibration and thus more accurate measurement of the rotational position due to increased mechanical stability in the vicinity of the bearing. The radial position of the bearing is predetermined, for example, by the center of the bearing cross section.

Preferably, the rotary encoder comprises a stationary sensor. This simplifies the electrical power supply and readout of measurement data.

The rotary encoder preferably comprises a material measure embodied and / or fixed on the container table and / or support structure for the sensor. The material measure can then be arranged in a suitable radial distance from the central axis of the container table.

Preferably, the material measure is arranged below and / or radially outside of the bearing. This increases the precision of the rotational position determination and facilitates access to the rotary encoder for maintenance measures.

Preferably, the motor is a torque motor. Preferably, the bearing is an axial-radial bearing and in particular a cross roller bearing. This allows, for example, a biasing of the bearing to minimize runout deviations of the container table and / or parallelism deviations between the container table and base.

Preferably, the bearing has a runout deviation of at most 0.015 mm to the container table towards and / or a parallelism deviation of at most 0.15 mm to the container table and to Untergestellt out. This makes it possible to achieve a precise container treatment even with pitch diameters of at least 1.5 m.

Preferably, the container table has a pitch circle diameter of 1.5 to 2.5 m. This container can be treated with relatively high engine power. A rotational position measurement radially outside the motor is then particularly advantageous for a precise treatment.

Preferably, the bearing is arranged radially between the motor and the pitch circle of the container table. The bearing is then in particular radially within drive motors for turntable for receiving the container. This favors one mechanically stable and yet compact design of the rotary machine.

The rotary machine is preferably designed as a direct printing machine, labeling machine, capper, filler, stretch blow molder, rinser, inspection machine or other container treatment machine. The precise rotational position determination of the associated container table serves for precise interaction with the treatment units respectively present on the rotary machine. These may for example be docked stationary and / or circulate on the container table. In addition, the access to the rotary encoder, for example, for control and / or replacement of the sensors and / or the material measure is facilitated depending on maintenance intervals.

Preferably, the stator of the motor is hanging and releasably attached to the bottom frame. This facilitates maintenance on the engine.

Preferably, the rotor of the motor is designed as a hollow shaft and / or surrounds a hollow shaft. The hollow shaft can then be used for media connections between the fixed part and the rotating part of the rotary machine.

Preferably, then inside the hollow shaft lines for media supply, in particular for energy supply, compressed gas supply or the like, the container table and / or a non-rotatably connected to the container table machine top part are arranged.

• 1 einen schematischen Längsschnitt durch eine Rundläufermaschine;
• 2 eine mögliche Ausgestaltung eines Behältertisches mit Lager und Motor; und
• 3 eine Detailansicht des Behältertisches der 2 mit einem Drehgeber.

Preferred embodiments of the invention are shown in the drawing. Show it:

• 1 a schematic longitudinal section through a rotary machine;
• 2 a possible embodiment of a container table with bearing and motor; and
• 3 a detailed view of the container table the 2 with a rotary encoder.

As the 1 reveals includes the rotary machine 1 for the treatment of containers 2 a fixed base 3 , a rotatable container table 4 for receiving the containers 2 on a circle 4a and a motor designed as an internal rotor 5 for direct drive of the container table 4 , This can thereby around a central central axis 1a the rotary machine 1 in particular, be continuously rotated.

The motor 5 is in particular a torque motor with an external stator 5a and an internal rotor 5b ,

The motor 5 is with the container table 4 by means of a supporting structure 6 connected. This is in the 1 indicated only schematically. The supporting structure 6 includes, for example, a central connection section 6a for non-rotatable coupling to the rotor 5b , Furthermore, the support structure comprises 6 preferably an outer support section 6b for non-rotatable coupling and support of the container table 4 ,

The supporting structure 6 is supported by an annular bearing 7 on the stationary base 3 from. The warehouse 7 is in particular an axial-radial bearing for absorbing axial forces and radial forces during the treatment of the container 2 ,

The warehouse 7 supports the container table 4 and / or the support structure 6 in a radially outside of the engine 5 lying area 8th from, for example, with respect to the outer circumference of the stator 5a is defined.

In the radially outer area 8th is also a rotary encoder 9 for the container table 4 available. The encoder 9 preferably includes a fixed / with the base 3 connected sensor 9a and one on the tray table 4 or on the support structure 6 trained / attached material measure 9b for the sensor 9a , The measuring standard 9a is a fully developed linear scale / angle scale with one from the sensor 9a recognizable origin and is from the sensor 9a preferably scanned without contact.

The sensor 9a is for the transmission of rotational position data of the container table 4 with a schematically indicated control 10 connected. This is possible wirelessly or by wire.

For simplified media connection of a schematically indicated machine head 12 the rotary machine 1 The rotor includes and / or encloses 5b of the motor 5 preferably a central channel 13 , the Indian 1 is indicated only schematically. The central channel 13 suitable for the media supply of the container table 4 and / or the machine shell 12 , In the channel 13 For example, media lines, data lines or the like may be from the stationary to the rotating part of the rotary machine 1 be guided.

In the 1 are schematically further turntable 14 for receiving the containers 2 , individual drive motors 15 for the turntables 14 and centering bells 16 for clamping the containers 2 on the turntables 14 represented as well as a lift curve 17 for lowering the centering bells 16 on the containers 2 ,

The 2 illustrates a concrete embodiment of a drive unit 18 of the Rotary machine 1 with the container table 4 , the engine 5 with stator 5a and rotor 5b , the supporting structure 6 , the camp 7 and the encoder 9 , Evident are also the drive motors 15 for the turntables 14 ,

In the 3 is the area of the camp 7 and the encoder 9 to be recognized in detail. Accordingly, the encoder 9 preferably in stock 7 arranged, in particular at a radial distance 19 from the center of the bearing cross-section of not more than 0,2 m.

The sensor 9a is preferably arranged fixed, for example on an outer bearing ring 7a that with the frame 3 connected is. On the support structure 6 or an associated inner bearing ring 7b of the camp 7 is then an associated material measure 9b for scanning by the sensor 9a educated.

The measuring standard 9b is preferably arranged on an outwardly facing cylinder jacket surface. Due to the arrangement of the encoder 9 in the radially outside of the engine 5 lying area 8th allows the material measure 9b a comparatively fine angular resolution for rotational position determination of the container table 4 ,

As in particular in the 3 it can be seen, is the camp 7 preferably an axial-radial bearing and in particular a prestressed cross roller bearing. The warehouse 7 takes in the working mode, for example, that of the centering 16 to the containers 2 and the turntables 14 transmitted clamping force.

The encoder 9 is preferably a so-called single-turn absolute value encoder. The encoder 9 works preferably on the principle of an inductive transmitter or a capacitive encoder. Depending on the installation position of the rotary encoder 9 but this can also work on the principle of an optical encoder.

The sensor 9a of the rotary encoder 9 is preferably accessible from below for maintenance, in particular for replacement.

The measuring standard 9b is preferably also accessible from below for maintenance measures, such as for control and / or cleaning, from below and in a preferred embodiment also exchangeable.

The accuracy of the encoder 9 is preferably ± 20 μm absolute or better, ie based on the origin of the material measure 9b ,

The circle 4a preferably has a diameter of at least 1.5 m and in particular at least 1.8 m.

By an arrangement of the rotary encoder 9 in the area 8th radially outside the motor 5 and especially in the area of the warehouse 7 such as at a radial distance 19 of not more than 0.2 m, can be a close-to-load connection of the encoder 9 be realized.

As a result, for example, the lowest load natural frequency in the range up to 10 Hz can be effectively suppressed. Furthermore, the engine designed as an internal rotor allows 5 due to comparatively low engine inertia suppression of resonant frequencies in the range above 100 Hz. Control circuits for the suppression of natural resonances in the drive unit 18 the rotary machine 1 Therefore, they can work more effectively, for example by amplitude-regulating a range of 10 Hz to 100 Hz.

Also for this reason is an arrangement of the encoder 9 directly in stock 7 , like in the 3 is shown, particularly advantageous. This simplifies the attachment of the sensor 9a on the fixed frame 3 both its electrical power supply and the transmission of measurement signals. In principle, one could use the stationary / circumferential attachment of the sensor 9a / the material measure 9b but also interchange with each other.

The motor 5 is preferably so on the frame 3 or the supporting structure 6 of the container table 4 suspended, that it is accessible for maintenance from below and as a whole and / or in parts, for example, the rotor 5b , expand downwards. A disassembly of the overlying container table 4 and / or its supporting structure 6 is not necessary for that.

Additional aggregates for container treatment, for example, stationary at Untergestell 3 are docked, are not shown for simplicity. The described drive unit 18 and the associated rotational position determination for the container table 4 can be used flexibly for different rotary machines for container treatment, for example for a direct printing machine, a labeling machine, a capper, a filler, a stretch blow molder, a rinser or an inspection machine.

The internal rotor direct drive of the container table 4 , So without intermediate gear or the like, allows with the radially outer encoder 9 both in terms of concentricity, concentricity, runout and parallelism to the frame 3 advantageous mechanical running characteristics as well as a precise, control technically simple and easy-to-maintain rotational position determination.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013218438 A1 [0002]

Claims (14)

A rotary machine (1) for treating containers (2), comprising: a fixed base (3); a rotatable container table (4) for receiving the container (2); a motor (5) designed as an internal rotor for direct drive of the container table (4); a bearing (7) for supporting the container table (4) and / or a rotatably connected support structure (6) on the underframe (3) radially outside the motor (5); and a rotary encoder (9) for determining the rotational position of the container table (4), characterized in that the rotary encoder (9) is arranged radially outside the motor (5). Rotary machine after Claim 1 , wherein the rotary encoder (9) in the region of the container table (4) and / or the support structure (6) at a radial distance (19) of less than 0.2 m from the bearing (7) is arranged. Rotary machine after Claim 1 or 2 , wherein the rotary encoder (9) comprises a stationary sensor (9a). Rotary machine after Claim 3 , wherein the rotary encoder (9) on the container table (4) and / or the support structure (6) formed / fixed Maßverkörperung (9b) for the sensor (9a). Rotary machine after Claim 4 , wherein the material measure (9b) below and / or radially outside of the bearing (7) is arranged. Rotary machine according to at least one of the preceding claims, wherein the motor (5) is a torque motor. Rotary machine according to at least one of the preceding claims, wherein the bearing (7) is an axial-radial bearing and in particular a cross roller bearing. Rotary machine according to at least one of the preceding claims, wherein the bearing (7) has a runout deviation of at most 0.015 mm to the container table (4) out and / or a parallelism deviation of at most 0.15 mm to the container table (4) and the base frame (3) Rotary machine according to at least one of the preceding claims, wherein the container table (4) has a pitch circle diameter (4a) of 1.5 to 2.5 m. Rotary machine according to at least one of the preceding claims, wherein the bearing (7) is arranged radially between the motor (5) and the pitch circle (4a) of the container table (4). Rotary machine according to at least one of the preceding claims, which is designed as a direct printing machine, labeling machine, capper, filler, stretch blow molder, rinser or inspection machine. Rotary machine according to at least one of the preceding claims, wherein the stator (5a) of the motor (5) is suspended and downwardly releasably secured to the underframe (3). Rotary machine according to at least one of the preceding claims, wherein the rotor (5b) of the motor (5) comprises and / or surrounds a central channel (13). Rotary machine after Claim 13 , wherein within the channel (13) lines for media supply, in particular energy supply, the container table (4) and / or with the container table (4) rotatably connected machine upper part (12) are arranged.

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